BCAA and other blends – capsules usually come in capsules or tablets that you swallow or as a powder that you mix. Both forms are equally effective. Most forms of BCAAs in capsules or tablets provide about 500-1,000 mg of BCAAs per serving. pill. An advantage of the pill form is that it is easier to take with you, for example when you take them to work, school, the gym or when you travel.